ITEM NAME:Headset Buddy 3.5mm Smartphone Headset To RJ9 Phone Adapter Cable Useful Jack ME Description: Easy installation, put the RJ plug into the telephone headset port, and insert your 3.5mm plug in the other end of the adapter, and you can begin to make / receive phone calls. You don't need to buy a new headset for your phone when use this adapter. The adapter cable length is about 30cm. Type: Headset Buddy Products: 3.5MM to RJ9 Crystal Headphone Converter Headset Buddy Color:Black Cable length:30cm Hole Size:3.5mm Package Included:1* Adapter Cable Note: Due to the hand measurement, there have size error about 1-2cm. Due to the difference between different monitors, the picture may not be reflecting the actual the item, please consider this before the purchase..Products: 3.5MM to RJ9 Crystal Headphone Converter Headset Buddy. Type: Headset Buddy. You don't need to buy a new headset for your phone when use this adapter. The adapter cable length is about 30cm.